PHP » Operators » ===

Syntax:
expression1 === expression2
expression1
An expression.
expression2
Another expression to compare it to.

Identical to.

This comparison operator returns TRUE if the first expression is identical to the second. The two expressions or variables have to be of the same type.

Examples

Code:
<?php

if (("5" == 5) && !("5" === 5)) {
   print "\"5\" is equal but not identical to 5";
}

?>
Output:
"5" is equal but not identical to 5
Explanation:

The identical operator requires that the types as well as the values are the same.